BANAL is a bookkeeping system that allows you to create and track invoices, clients, projects, timesheets, expenses, suppliers, etc. BANAL is also a client/server application so you can keep one set of books on your system while allowing everyone access.

BDAY is a set of Perl scripts to remind you of
upcoming birthdays. It sets up a small database
with the names and birthdays of the people you
can't forget and sends you an email a certain
number of days before that birthday comes up as
well as on that specific day.

beancounter enables stockmarket data analysis and performance evaluation. It has two main modes. The first is data gathering - both current data (e.g. closing prices, high, low, volume etc.) and historical price data can be retrieved efficiently using multiple securities per requests, and stored in an SQL database (PostgreSQL, MySQL, and SQLite are supported) via easy command line operations. The second mode is data analysis, based on the previously stored data. This comprises various performance reports, as well as a Value-at-Risk analysis. beancounter is implemented as a Perl module, and a Perl command-line frontend to the module. It supports different stock markets from around the globe, foreign exchange rates, US mutual funds, and US options.

Bidwatcher is a tool for eBay users that tracks
your current bids and listings and has an
integrated snipe tool. You can run bidwatcher in
the background and it periodically checks your
auctions status, and executes any bids that are
scheduled.

The C++ Money class handles all functions for using decimal number monies. It eliminates problems associated with using C/C++ float or double to handle money (e.g., picking up or dropping odd cents due to rounding).

CALAMAR is an accounting program entirely written in Java. It supports multiple clients, a flexible chart of accounts, multiple currencies and VAT. Calamar has been localized for French, German, Polish, and English.

CBB is a finance management application. It allows users to keep track of deposits and withdrawals from checking accounts, savings accounts, credit cards, and money markets. It generates reports summarizing the current financial state or graphs the net worth. It is able to import existing Quicken accounts.

Finance::Quote is a Perl module which can fetch on-line stock quotes, including those from American, European, Canadian and Australian markets. Information from a number of investment houses is also available. Features include currency lookups and conversions, automatic failover support, and loadable user modules.

FreeCheck is a free check-printing utility, currently only for US and possibly Canadian checks. You can use it to print your own checks on blank check stock, available from office supply stores and various places around the web. It generates a PostScript file which can be saved to disk, printed, or converted to PDF using GhostScript.